astonishing

adjectives

surprising greatly
"she does an amazing amount of work"; "the dog was capable of astonishing tricks"
amazing, astonishing
so surprisingly impressive as to stun or overwhelm
"such an enormous response was astonishing"; "an astounding achievement"; "the amount of money required was staggering"; "suffered a staggering defeat"; "the figure inside the boucle dress was stupefying"
astonishing, astounding, staggering, stupefying